Patents by Inventor Nigel K. Graham

Nigel K. Graham has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Foamable resin composition and a thermoplastic foamable pattern and metal casting manufacturing method using said composition
    Patent number: 5403866
    Abstract: Disclosed are a foamable resin composition which comprises a copolymer with a weight-average molecular weight of 150,000-350,000 produced by copolymerization of a monomer mixture of 55-85% by weight of styrene and 45-15% by weight of a methacrylic acid ester represented by general formula (I)CH.sub.2 .dbd.C(CH.sub.3)COOR (I)(wherein R represents a C.sub.
    Type: Grant
    Filed: August 18, 1993
    Date of Patent: April 4, 1995
    Assignees: Hitachi Chemical Co., Ltd., Foseco International Ltd.
    Inventors: Yoshiyuki Kato, Hideaki Shibata, William Simmons, Nigel K. Graham
  • Metal casting patterns
    Patent number: 4842037
    Abstract: A metal casing pattern of expanded thermoplastics material such as polystyrene or polymethyl methacrylate has a filter comprising a porous ceramic body, such as a body having pores extending from one face to another face or a foam structure, incorporated therein.
    Type: Grant
    Filed: May 16, 1988
    Date of Patent: June 27, 1989
    Assignee: Foseco International Limited
    Inventors: John R. Brown, Nigel K. Graham, Russell A. King